Quectel Wireless Solutions 201510UC20 User Manual

UC20 User Manual

UMTS/HSPA Module Series

Rev. UC20_User_Manual_V1.4

Date: 2014-10-22

www.quectel.com

UMTS/HSPA Module Series

UC20 User Manual

Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters:

Quectel Wireless Solutions Co., Ltd.

Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233

Tel: +86 21 5108 6236

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GENERAL NOTES

QUECTEL OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION

PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT

TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT

MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT

ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR

RELIANCE UPON THE INFORMATION. THE INFORMATION SUPPLIED HEREIN IS SUBJECT TO

CHANGE WITHOUT PRIOR NOTICE.

COPYRIGHT

THIS INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF

QUECTEL CO., LTD. TRANSMITTABLE, REPRODUCTION, DISSEMINATION AND EDITING OF THIS

DOCUMENT AS WELL AS UTILIZATION OF THIS CONTENTS ARE FORBIDDEN WITHOUT

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ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL

OR DESIGN.

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UMTS/HSPA Module Series

Revision

Date

Author

Description

1.0

2013-07-17

Mountain ZHOU

Initial

1.1

2013-08-29

Mountain ZHOU

1. Updated USB driver information.

2. Added GNSS contents in Chapter 4.

3. Added GNSS current consumption.

4. Updated GNSS antenna requirements.

5. Released USIM_PRESENCE function.

1.2

2014-01-21

Mountain ZHOU

1. Added UC20-G information.

2. Added AMR-WB feature.

3. Added USB upgrade test points’ diagram.

4. Added reference design of transistor circuit on

UART interface.

5. Deleted debug function of Debug UART

interface.

6. Released AP_READY, main UART upgrade

function and Rx-diversity function.

7. Modified UC20-A frequency bands.

8. Modified W_DISABLE# definition.

9. Modified GNSS sensitivity definition.

10. Modified turning on timing figure.

11. Added power saving methods in Sleep Mode

in Chapter 3.5.1.

12. Updated airplane mode in Chapter 3.5.2.

13. Updated I2C pins definition.

14. Updated current consumption.

1.3

2014-03-05

Mountain ZHOU

1. Modified VDD_2V85 pin definition and GNSS

LNA design circuit.

2. Added notes about UC20 versions in Chapter

2.1.

3. Added description about the sleep mode in

UC20 User Manual

About the Document

History

UC20_Hardware_Design Confidential / Released 2 / 84

UMTS/HSPA Module Series

Chapter 3.16.2.

4. Updated power circuit of Figure 6.

5. Updated current consumption.

1.4

2014-10-22

Mountain ZHOU

1. Updated internet protocol features and USB

driver.

2. Updated VBAT input voltage range.

3. Updated Chapter 3.6.2, and added VBAT

drop figure.

4. Updated antenna requirement in Chapter

5.3.1.

5. Updated current consumption.

6. Updated recommended footprint in Chapter

7.2.

7. Deleted description of UART autobauding.

8. Deleted Chapter of USIM connector.

9. Changed TXB0108 chip to TXS0108 chip.

UC20 User Manual

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UC20 User Manual

Contents

About the Document ................................................................................................................................... 2

Contents ....................................................................................................................................................... 4

Table Index ................................................................................................................................................... 7

Figure Index ................................................................................................................................................. 8

1 Introduction ........................................................................................................................................ 10

1.1. Safety Information ............................................................................................................... 11

2 Product Concept ................................................................................................................................ 12

2.1. General Description ............................................................................................................. 12

2.2. Directives and Standards ..................................................................................................... 13

2.2.1. FCC Statement ........................................................................................................... 13

2.2.2. FCC Radiation Exposure Statement ........................................................................... 13

2.3. Key Features ....................................................................................................................... 14

2.4. Functional Diagram ............................................................................................................. 16

2.5. Evaluation Board ................................................................................................................. 17

3 Application Interface ......................................................................................................................... 18

3.1. General Description ............................................................................................................. 18

3.2. Pin Assignment.................................................................................................................... 19

3.3. Pin Description .................................................................................................................... 20

3.4. Operating Modes ................................................................................................................. 26

3.5. Power Saving ...................................................................................................................... 27

3.5.1. Sleep Mode ................................................................................................................ 27

3.5.1.1. UART Application ............................................................................................. 27

3.5.1.2. USB Application with Suspend Function ........................................................... 28

3.5.1.3. USB Application without Suspend Function ...................................................... 28

3.5.2. Airplane Mode ............................................................................................................ 29

3.6. Power Supply ...................................................................................................................... 30

3.6.1. Power Supply Pins ..................................................................................................... 30

3.6.2. Decrease Voltage Drop .............................................................................................. 30

3.6.3. Reference Design for Power Supply ........................................................................... 31

3.6.4. Monitor the Power Supply .......................................................................................... 32

3.7. Turn on and off Scenarios .................................................................................................... 32

3.7.1. Turn on Module Using the PWRKEY .......................................................................... 32

3.7.2. Turn off Module .......................................................................................................... 34

3.7.2.1. Turn off Module Using the PWRKEY Pin........................................................... 34

3.7.2.2. Turn off Module Using AT Command ................................................................ 35

3.7.2.3. Automatic Shutdown ......................................................................................... 35

3.8. Reset the Module ................................................................................................................ 36

3.9. RTC Backup ........................................................................................................................ 38

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UC20 User Manual

3.10. UART Interface .................................................................................................................... 39

3.11. USIM Card Interface ............................................................................................................ 42

3.12. USB Interface ...................................................................................................................... 45

3.13. PCM and I2C Interface ........................................................................................................ 46

3.14. ADC Function ...................................................................................................................... 49

3.15. Network Status Indication .................................................................................................... 50

3.16. Operating Status Indication .................................................................................................. 51

3.16.1. STATUS ..................................................................................................................... 51

3.16.2. SLEEP_IND ............................................................................................................... 51

3.17. Behavior of the RI ................................................................................................................ 53

4 GNSS Receiver ................................................................................................................................... 54

4.1. General Description ............................................................................................................. 54

4.2. GNSS Performance ............................................................................................................. 55

4.3. Layout Guideline ................................................................................................................. 56

5 Antenna Interface ............................................................................................................................... 57

5.1. GSM/UMTS Antenna Interface ............................................................................................ 57

5.1.1. Pin Definition .............................................................................................................. 57

5.1.2. Operating Frequency .................................................................................................. 57

5.1.3. Reference Design....................................................................................................... 58

5.2. GNSS Antenna Interface ..................................................................................................... 59

5.2.1. Reference Design for Passive Antenna ...................................................................... 59

5.2.2. Reference Design for Active Antenna ......................................................................... 60

5.3. Antenna Installation ............................................................................................................. 60

5.3.1. Antenna Requirement ................................................................................................ 60

5.3.2. Install the Antenna with RF Connector ........................................................................ 61

6 Electrical, Reliability and Radio Characteristics ............................................................................ 63

6.1. Absolute Maximum Ratings ................................................................................................. 63

6.2. Power Supply Ratings ......................................................................................................... 63

6.3. Operating Temperature ........................................................................................................ 64

6.4. Current Consumption .......................................................................................................... 64

6.5. RF Output Power ................................................................................................................. 68

6.6. RF Receiving Sensitivity ...................................................................................................... 69

6.7. Electrostatic Discharge ........................................................................................................ 69

7 Mechanical Dimensions .................................................................................................................... 70

7.1. Mechanical Dimensions of the Module................................................................................. 70

7.2. Footprint of Recommendation.............................................................................................. 73

7.3. Top View of the Module ....................................................................................................... 74

7.4. Bottom View of the Module .................................................................................................. 74

8 Storage and Manufacturing .............................................................................................................. 75

8.1. Storage ................................................................................................................................ 75

8.2. Manufacturing and Welding ................................................................................................. 75

8.3. Packaging ........................................................................................................................... 76

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UC20 User Manual

9 Appendix A Reference ....................................................................................................................... 78

10 Appendix B GPRS Coding Scheme ................................................................................................. 82

11 Appendix C GPRS Multi-slot Class .................................................................................................. 83

12 Appendix D EDGE Modulation and Coding Scheme ..................................................................... 84

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UC20 User Manual

Table Index

TABLE 1: UC20 SERIES FREQUENCY BANDS .............................................................................................. 12

TABLE 2: UC20 KEY FEATURES ..................................................................................................................... 14

TABLE 3: IO PARAMETERS DEFINITION ........................................................................................................ 20

TABLE 4: PIN DESCRIPTION ........................................................................................................................... 20

TABLE 5: OVERVIEW OF OPERATING MODES ............................................................................................. 26

TABLE 6: VBAT AND GND PINS ....................................................................................................................... 30

TABLE 7: PWRKEY PIN DESCRIPTION .......................................................................................................... 32

TABLE 8: RESET_N PIN DESCRIPTION ......................................................................................................... 36

TABLE 9: PIN DEFINITION OF THE MAIN UART INTERFACE ....................................................................... 39

TABLE 10: PIN DEFINITION OF THE DEBUG UART INTERFACE ................................................................. 40

TABLE 11: LOGIC LEVELS OF DIGITAL I/O .................................................................................................... 40

TABLE 12: PIN DEFINITION OF THE USIM INTERFACE ............................................................................... 42

TABLE 13: USB PIN DESCRIPTION ................................................................................................................ 45

TABLE 14: PIN DEFINITION OF PCM AND I2C INTERFACE .......................................................................... 48

TABLE 15: PIN DEFINITION OF THE ADC ...................................................................................................... 49

TABLE 16: CHARACTERISTIC OF THE ADC .................................................................................................. 49

TABLE 17: PIN DEFINITION OF NETWORK INDICATOR ............................................................................... 50

TABLE 18: WORKING STATE OF THE NETWORK INDICATOR..................................................................... 50

TABLE 19: PIN DEFINITION OF STATUS ........................................................................................................ 51

TABLE 20: PIN DEFINITION OF SLEEP_IND .................................................................................................. 52

TABLE 21: BEHAVIOR OF THE RI ................................................................................................................... 53

TABLE 22: GNSS PERFORMANCE ................................................................................................................. 55

TABLE 23: PIN DEFINITION OF THE RF ANTENNA ....................................................................................... 57

TABLE 24: THE MODULE OPERATING FREQUENCIES ................................................................................ 57

TABLE 25: PIN DEFINITION OF GNSS ANTENNA .......................................................................................... 59

TABLE 26: GNSS FREQUENCY ....................................................................................................................... 59

TABLE 27: ANTENNA REQUIREMENTS .......................................................................................................... 61

TABLE 28: ABSOLUTE MAXIMUM RATINGS .................................................................................................. 63

TABLE 29: THE MODULE POWER SUPPLY RATINGS .................................................................................. 63

TABLE 30: OPERATING TEMPERATURE ........................................................................................................ 64

TABLE 31: THE MODULE CURRENT CONSUMPTION .................................................................................. 65

TABLE 32: CONDUCTED RF OUTPUT POWER ............................................................................................. 68

TABLE 33: CONDUCTED RF RECEIVING SENSITIVITY ................................................................................ 69

TABLE 34: ELECTROSTATICS DISCHARGE CHARACTERISTICS ............................................................... 69

TABLE 35: RELATED DOCUMENTS ................................................................................................................ 78

TABLE 36: TERMS AND ABBREVIATIONS ...................................................................................................... 78

TABLE 37: DESCRIPTION OF DIFFERENT CODING SCHEMES .................................................................. 82

TABLE 38: GPRS MULTI-SLOT CLASSES ...................................................................................................... 83

TABLE 39: EDGE MODULATION AND CODING SCHEME ............................................................................. 84

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UC20 User Manual

Figure Index

FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 17

FIGURE 2: PIN ASSIGNMENT (TOP VIEW) .................................................................................................... 19

FIGURE 3: UART SLEEP APPLICATION ......................................................................................................... 27

FIGURE 4: USB APPLICATION WITH SUSPEND FUNCTION ........................................................................ 28

FIGURE 5: USB SLEEP APPLICATION WITHOUT SUSPEND FUNCTION .................................................... 29

FIGURE 6: VOLTAGE DROP DURING TRANSMITTING BURST .................................................................... 31

FIGURE 7: STAR STRUCTURE OF THE POWER SUPPLY............................................................................ 31

FIGURE 8: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 32

FIGURE 9: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................... 33

FIGURE 10: TURN ON THE MODULE USING KEYSTROKE ......................................................................... 33

FIGURE 11: TIMING OF TURNING ON MODULE ........................................................................................... 34

FIGURE 12: TIMING OF TURNING OFF MODULE ......................................................................................... 35

FIGURE 13: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ...................................... 37

FIGURE 14: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON ...................................................... 37

FIGURE 15: TIMING OF RESETTING MODULE ............................................................................................. 37

FIGURE 16: RTC SUPPLY FROM NON-CHARGEABLE BATTERY ................................................................ 38

FIGURE 17: RTC SUPPLY FROM RECHARGEABLE BATTERY .................................................................... 38

FIGURE 18: RTC SUPPLY FROM CAPACITOR .............................................................................................. 39

FIGURE 19: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ................................................................... 41

FIGURE 20: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 41

FIGURE 21: RS232 LEVEL MATCH CIRCUIT .................................................................................................. 42

FIGURE 22: REFERENCE CIRCUIT OF THE 8 PIN USIM CARD ................................................................... 43

FIGURE 23: REFERENCE CIRCUIT OF THE 6 PIN USIM CARD ................................................................... 44

FIGURE 24: REFERENCE CIRCUIT OF USB APPLICATION ......................................................................... 45

FIGURE 25: TEST POINTS OF FIRMWARE UPGRADE ................................................................................. 46

FIGURE 26: PRIMARY MODE TIMING ............................................................................................................ 47

FIGURE 27: AUXILIARY MODE TIMING .......................................................................................................... 47

FIGURE 28: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 48

FIGURE 29: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .......................................................... 51

FIGURE 30: REFERENCE CIRCUIT OF THE STATUS ................................................................................... 51

FIGURE 31: REFERENCE CIRCUIT OF THE SLEEP_IND ............................................................................. 52

FIGURE 32: RELATIONSHIP BETWEEN SLEEP AND NETWORK PAGING .................................................. 52

FIGURE 33: REFERENCE CIRCUIT OF ANTENNA INTERFACE ................................................................... 58

FIGURE 34: REFERENCE CIRCUIT OF GNSS PASSIVE ANTENNA ............................................................. 59

FIGURE 35: REFERENCE CIRCUIT OF GNSS ACTIVE ANTENNA ............................................................... 60

FIGURE 36: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ................................................ 61

FIGURE 37: MECHANICALS OF UF.L-LP CONNECTORS ............................................................................. 62

FIGURE 38: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ........................................................... 62

FIGURE 39: UC20 TOP AND SIDE DIMENSIONS ........................................................................................... 70

FIGURE 40: UC20 BOTTOM DIMENSIONS (BOTTOM VIEW) ....................................................................... 71

FIGURE 41: BOTTOM PADS DIMENSIONS (BOTTOM VIEW) ....................................................................... 72

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UC20 User Manual

FIGURE 42: RECOMMENDED FOOTPRINT (TOP VIEW) .............................................................................. 73

FIGURE 43: TOP VIEW OF THE MODULE ...................................................................................................... 74

FIGURE 44: BOTTOM VIEW OF THE MODULE .............................................................................................. 74

FIGURE 45: LIQUIDS TEMPERATURE ............................................................................................................ 76

FIGURE 46: CARRIER TAPE ............................................................................................................................ 77

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UC20 User Manual

1 Introduction

This document defines the UC20 module and describes its hardware interface which are connected with

your application and the air interface.

This document can help you quickly understand module interface specifications, electrical and

mechanical details. Associated with application notes and user guide, you can use UC20 module to

design and set up mobile applications easily.

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UMTS/HSPA Module Series

Full attention must be given to driving at all times in order to reduce the risk of an

accident. Using a mobile while driving (even with a handsfree kit) cause distraction

and can lead to an accident. You must comply with laws and regulations restricting

the use of wireless devices while driving.

Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it

switched off. The operation of wireless appliances in an aircraft is forbidden to

prevent interference with communication systems. Consult the airline staff about

the use of wireless devices on boarding the aircraft, if your device offers a Airplane

Mode which must be enabled prior to boarding an aircraft.

Switch off your wireless device when in hospitals or clinics or other health care facilities. These requests are desinged to prevent possible interference with sentitive medical equipment.

Cellular terminals or mobiles operate over radio frequency signal and cellular

network and cannot be guaranteed to connect in all conditions, for example no

mobile fee or an invalid SIM card. While you are in this condition and need

emergent help, please remember using emergency call. In order to make or

receive call, the cellular terminal or mobile must be switched on and in a service

area with adequate cellular signal strength.

Your cellular terminal or mobile contains a transmitter and receiver. When it is ON ,

it receives and transmits radio frequency energy. RF interference can occur if it is

used close to TV set, radio, computer or other electric equipment.

In locations with potencially explosive atmospheres, obey all posted signs to turn

off wireless devices such as your phone or other cellular terminals. Areas with

potencially exposive atmospheres including fuelling areas, below decks on boats,

fuel or chemical transfer or storage facilities, areas where the air contains

chemicals or particles such as grain, dust or metal powders.

UC20 User Manual

1.1. Safety Information

The following safety precautions must be observed during all phases of the operation, such as usage,

service or repair of any cellular terminal or mobile incorporating UC20 module. Manufacturers of the cellular

terminal should send the following safety information to users and operating personnel and to incorporate

these guidelines into all manuals supplied with the product. If not so, Quectel does not take on any liability

for customer failure to comply with these precautions.

UC20_Hardware_Design Confidential / Released 11 / 84

UMTS/HSPA Module Series

1)

. UC20-G includes Data-only and Telematics versions. Data-only version does not support voice

function, Telematics version supports it.

Module

GSM

850

EGSM

900

DCS

1800

PCS

1900

UMTS

800

UMTS

850

UMTS

900

UMTS

1900

UMTS

2100

Rx-

diversity

GNSS

UC20-G



NOTE

UC20 User Manual

2 Product Concept

2.1. General Description

UC20 is an embedded HSPA+/EDGE engine with Rx-diversity. Its UMTS-based modem provides data

connectivity on HSPA+, HSDPA, HSUPA, WCDMA, EDGE, GPRS networks. It can also provide

GPS/GLONASS and voice functionality1) for your specific application. UC20 offers a maximum data rate

of 14.4Mbps on downlink and 5.76Mbps on uplink in HSPA+/HSPA mode. UC20 also support

GPRS/EDGE multi-slot class 12. GPRS supports the coding schemes CS-1, CS-2, CS-3 and CS-4.

EDGE supports CS1-4 and MCS1-9 coding schemes.

Table 1: UC20 Series Frequency Bands

More details about GPRS/EDGE multi-slot configuration and coding schemes, please refer to Appendix B,

C and D.

With a tiny profile of 32.0mm × 29.0mm × 2.5mm, UC20-G can meet almost all requirements for M2M

application such as automotive, metering, tracking system, security solutions, routers, wireless POS,

mobile computing devices, PDA phone and tablet PC, etc..

UC20-G is an SMD type module, which can be embedded in application through its 112-pin pads

including 72 LCC signal pads and 40 other pads.

UC20-G is integrated with internet service protocols like TCP/UDP and PPP. Extended AT commands

have been developed for customer to use these internet service protocols easily.

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UMTS/HSPA Module Series

Part

Number

Frequency

Range (MHz)

Peak

Gain

(XZ-V)

Average Gain

(XZ-V)

VSWR

Impedance

3R007A

UMTS2100: 1922~2168MHz

UMTS1900:1852~1992MHz

UMTS900: 882~958MHz

UMTS850:822~896MHz

UMTS800:832~887MHz

1 dBi typ.

3 max

50Ω

UC20 User Manual

2.2. Directives and Standards

The UC20 module is designed to comply with the FCC statements. FCC ID: XMR-201510UC20

The Host system using UC20, should have label indicated FCC ID: XMR-201510UC20.

2.2.1. FCC Statement

1. This device complies with Part 15 of the FCC rules. Operation is subject to the following conditions:

a) This device may not cause harmful interference.

b) This device must accept any interference received, including interference that may cause undesired

operation.

2. Changes or modifications not expressly approved by the party responsible for compliance could

void the user’s authority to operate the equipment.

2.2.2. FCC Radiation Exposure Statement

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.

This equipment should be installed and operated with minimum distance 20cm between the radiator and

your body as well as kept minimum 20cm from radio antenna depending on the Mobile status of this

module usage. This module should NOT be installed and operating simultaneously with other radio.

The manual of the host system, which uses UC20, must include RF exposure warning statement to

advice user should keep minimum 20cm from the radio antenna of UC20 module depending on the

Mobile status.

Note: If a portable device (such as PDA) uses UC20 module, the device needs to do permissive change

and SAR testing.

The following list of antenna is indicating the maximum permissible antenna gain.

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UMTS/HSPA Module Series

Feature

Details

Power Supply

Supply voltage: 3.3V~4.3V

Typical supply voltage: 3.8V

Frequency Bands

UC20-G: GSM850/900/1800/1900, UMTS800/850/900/1900/2100

Transmission Data

HSPA R6: Max 14.4Mbps (DL)/Max 5.76Mbps (UL)

UMTS R99: Max 384kbps (DL)/Max 384kbps (UL)

EDGE: Max 236.8kbps (DL)/Max 236.8kbps (UL)

GPRS: Max 85.6kbps (DL)/Max 85.6kbps (UL)

CSD: 14.4kbps

Transmitting Power

Class 4 (33dBm±2dB) for GSM850 and EGSM900

Class 1 (30dBm±2dB) for DCS1800 and PCS1900

Class E2 (27dBm±3dB) for GSM850 and EGSM900 8-PSK

Class E2 (26dBm+3/-4dB) for DCS1800 and PCS1900 8-PSK

Class 3 (24dBm+1/-3dB) for UMTS800/850/900/1900/2100

HSPA and UMTS Features

HSPA data rate is corresponded with 3GPP R6. 14.4Mbps on downlink

and 5.76Mbps on uplink.

WCDMA data rate is corresponded with 3GPP R99/R4. 384kbps on

downlink and 384kbps on uplink.

Support both 16-QAM and QPSK modulation.

GSM/GPRS/EDGE

Data Features

GPRS:

Support GPRS multi-slot class 12 (10 by default)

Coding scheme: CS-1, CS-2, CS-3 and CS-4

Maximum of four Rx time slots per frame

EDGE:

Support EDGE multi-slot class 12 (12 by default).

Support GMSK and 8-PSK for different MCS (Modulation and Coding

scheme).

Downlink coding schemes: CS 1-4 and MCS 1-9

Uplink coding schemes: CS 1-4 and MCS 1-9

CSD:

CSD transmission rates: 14.4kbps non-transparent

Support Unstructured Supplementary Services Data (USSD).

Internet Protocol Features

Support TCP/UDP/PPP/FTP/SMTP/HTTP/FILE/MMS/SSL protocols

Support the protocols PAP (Password Authentication Protocol) and

CHAP (Challenge Handshake Authentication Protocol) usually used

UC20 User Manual

2.3. Key Features

The following table describes the detailed features of UC20 module.

Table 2: UC20 Key Features

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UMTS/HSPA Module Series

for PPP connections.

SMS

Text and PDU mode

Point to point MO and MT

SMS cell broadcast

SMS storage: ME by default

USIM Interface

Support USIM/SIM card: 1.8V, 3.0V

Audio Features

Support one digital audio interface: PCM interface

GSM: HR/FR/EFR/AMR/AMR-WB

WCDMA: AMR/AMR-WB

Echo cancellation and noise suppression

PCM Interface

Used for audio function with external codec.

Support 8-bit A-law, μ-law and 16-bit linear data formats.

Support long frame sync and short frame sync.

Support master and slave mode, but must be the master in long frame

sync.

UART Interface

Support two UART interfaces: main UART interface and debug UART

interface.

Main UART interface:

 Seven lines on main UART interface  Support RTS and CTS hardware flow control  Baud rate can reach up to 921600bps, 115200bps by default  Used for AT command, data transmission or firmware upgrade  Support multiplexing function

Debug UART interface:

 Two lines on debug UART interface: DBG_TXD and DBG_RXD  Can be used for GNSS NMEA sentences output

USB Interface

Compliant with USB 2.0 specification (slave only), the data transfer

rate can reach up to 480Mbps.

Used for AT command communication, data transmission, GNSS

NMEA output, software debug and firmware upgrade.

USB Driver: Windows XP, Windows Vista, Windows 7, Windows 8,

Windows CE5.0/6.0/7.0, Linux 2.6/3.0, Android 2.3/4.0/4.2.

Rx-diversity

Support UMTS Rx-diversity

GNSS Features

Gen8 of Qualcomm GNSS engine (GPS and GLONASS)

Protocol: NMEA 0183

AT Commands

Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT

commands.

Real Time Clock

Implemented

Network Indication

Two pins including NET_MODE and NET_STATUS to indicate

network connectivity status.

UC20 User Manual

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UMTS/HSPA Module Series

2)

. When the module works within this restricted temperature range, RF performance might degrade. For

example, the frequency error or the phase error would increase.

Antenna Interface

Include main GSM/UMTS antenna, UMTS diversity antenna and

GNSS antenna.

Physical Characteristics

Size: 32.0±0.15 × 29.0±0.15 × 2.5±0.2mm

Weight: approx. 4.9g

Temperature Range

Normal operation: -35°C ~ +75°C

Restricted operation: -40°C ~ -35°C and +75°C ~ +85°C 2)

Storage temperature: -45°C ~ +90°C

Firmware Upgrade

USB interface (by default) or main UART interface.

RoHS

All hardware components are fully compliant with EU RoHS directive.

NOTE

UC20 User Manual

2.4. Functional Diagram

The following figure shows a block diagram of UC20 and illustrates the major functional parts.

 Power management  Baseband  DDR+NAND flash  Radio frequency  Peripheral interface

--UART interface

--USIM card interface

--USB interface

--PCM interface

--ADC interface

--Status indication

--Control interface

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UMTS/HSPA Module Series

PWRKEY

RESET_N

32kHz

19.2MHz

Power

Management Unit

Baseband

RF Transceiver

GNSS Receiver

ANT_GNSS

RF

Switch

DDR RAM/

ANT_MAIN

USIM

Status

ADC

PCM

UART

VBAT_BB

USB

ANT_DIV

VBAT_RF

VDD_EXT

GSM

UMTS

RF

Switch

VDD_2V85

WAKEUP_IN

VRTC

SLEEP_IND

W_DISABLE#

NAND Flash

UC20 User Manual

2.5. Evaluation Board

In order to help you to develop applications with UC20, Quectel supplies an evaluation board (EVB),

RS-232 to USB cable, USB data cable, power adapter, earphone, antenna and other peripherals to

control or test the module. For details, please refer to document [2].

UC20_Hardware_Design Confidential / Released 17 / 84

Figure 1: Functional Diagram

UMTS/HSPA Module Series

UC20 User Manual

3 Application Interface

3.1. General Description

UC20 is equipped with a 72-pin 1.3mm pitch SMT pads plus 40-pin other pads that connect to cellular

application platform. Sub-interfaces included in these pads are described in detail in the following

chapters:

 Power supply  UART interface  USIM interface  USB interface  PCM interface  ADC interface  Status indication

UC20_Hardware_Design Confidential / Released 18 / 84

UMTS/HSPA Module Series

35

36

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

1

3

4

5

6

7

2

WAKEUP_IN

AP_READY

SLEEP_IND

W_DISABLE#

NET_MODE

NET_STATUS

VDD_EXT

GND

DBG_RXD

DBG_TXD

USIM_PRESENCE

USIM_VDD

USIM_DATA

USIM_CLK

USIM_RST

VRTC

8

9

10

11

12

13

14

15

16

17

18

19

54

53

52

51

50

49

48

47

46

45

44

43

42

41

40

39

38

37

72

71

70

69

68

67

66

65

64

63

62

61

60

59

58

57

56

55

USIM_GND

GND

RESET_N

PWRKEY

AGND

RESERVED

PCM_IN*

PCM_OUT*

PCM_SYNC*

PCM_CLK*

RESERVED

VDD_2V85

ANT_DIV

GND

USB_VBUS

USB_DM

USB_DP

RXD

TXD

DTR

RTS

CTS

DCD

RI

STATUS

VBAT_BB

VBAT_RF

GND

RESERVED

GND

ANT_MAIN

GND

ANT_GNSS

GND

ADC1

RESERVED

I2C_SDA

I2C_SCL

RESERVED

ADC0

GND

73

74

75

76

77

78

79

80

81

82

83

84

100

101

102

106

107

111

112

103

104

109

105

110

89

94

98

88

93

97

86

91

96

85

90

95

99

87

92

Power

USB

UART

USIM PCM*

ANT

GND

RESERVED

OTHERS

108

1. Keep all RESERVED pins and unused pins unconnected.

2. GND pads 85~112 should be connected to ground in the design, and RESERVED pads 73~84

should not be designed in schematic and PCB decal.

3. “*” means PCM function is only supported in Telematics version.

NOTES

UC20 User Manual

3.2. Pin Assignment

The following figure shows the pin assignment of the UC20 module.

Figure 2: Pin Assignment (Top View)

UC20_Hardware_Design Confidential / Released 19 / 84

UMTS/HSPA Module Series

Type

Description

IO

Bidirectional input/output

DI

Digital input

DO

Digital output

PI

Power input

PO

Power output

AI

Analog input

AO

Analog output

OD

Open drain

Power Supply

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

VBAT_BB

59,60

PI

Power supply for

module baseband

part.

Vmax = 4.3V

Vmin = 3.3V

Vnorm = 3.8V

It must be able to

provide sufficient

current up to 0.8A.

VBAT_RF

57,58

PI

Power supply for

module RF part.

Vmax = 4.3V

Vmin = 3.3V

Vnorm = 3.8V

It must be able to

provide sufficient

current in a transmitting

burst which typically

rises to 2.0A.

VRTC

18

IO

Power supply for

internal RTC circuit.

VOmax = 3.25V

when VBAT ≥ 3.3V.

VI = 1.5V~3.25V at

IIN = 3uA when

VBAT is not applied.

If unused, keep it open.

VDD_EXT

7

PO

Provide 1.8V for

Vnorm = 1.8V

Power supply for

UC20 User Manual

3.3. Pin Description

The following tables show the UC20’s pin definition.

Table 3: IO Parameters Definition

Table 4: Pin Description

UC20_Hardware_Design Confidential / Released 20 / 84

UMTS/HSPA Module Series

external circuit.

IOmax = 20mA

external GPIO’s pull up

circuits.

VDD_2V85

34

PO

Provide 2.85V for

external circuit.

Vnorm = 2.85V

IOmax = 100mA

Reserved for future

application. If unused,

keep it open.

GND

8,9,19,36,

46,48,50~

54,56,72,

85~112

Ground.

Turn On/Off

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

PWRKEY

21

DI

Turn on/off the

module.

R

PU

≈ 200kΩ

VIHmax = 2.1V

VIHmin = 1.3V

VILmax = 500mV

Pull-up to 1.8V

internally.

RESET_N

20

DI

Reset the module.

RPU ≈ 200kΩ

VIHmax = 2.1V

VIHmin = 1.3V

VILmax = 500mV

Pull-up to 1.8V

internally. Active low.

If unused, keep it

open.

Status Indication

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

STATUS

61

OD

Indicate the module

operating status.

Require external

pull-up. If unused,

keep it open.

NET_MODE

5

DO

Indicate the module

network registration

mode.

VOHmin = 1.35V

VOLmax = 0.45V

1.8V power domain.

If unused, keep it

open.

NET_

STATUS

6

DO

Indicate the module

network activity

status.

VOHmin = 1.35V

VOLmax = 0.45V

1.8V power domain.

If unused, keep it

open.

SLEEP_IND

3

DO

Indicate the sleep

status.

VOHmin = 1.35V

VOLmax = 0.45V

1.8V power domain.

If unused, keep it

open.

USB Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

USB_VBUS

71

PI

USB detection.

Vmax = 5.25V

Vmin = 3.0V

Vnorm = 5.0V

UC20 User Manual

UC20_Hardware_Design Confidential / Released 21 / 84

UMTS/HSPA Module Series

USB_DP

69

IO

USB differential data

bus.

Compliant with USB

2.0 standard

specification.

Require differential

impedance of 90Ω.

USB_DM

70

IO

USB differential data

bus.

Compliant with USB

2.0 standard

specification.

Require differential

impedance of 90Ω.

USIM Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

USIM_GND

10

Specified ground for

USIM card.

USIM_VDD

14

PO

Power supply for

USIM card.

For 1.8V USIM:

Vmax = 1.9V

Vmin = 1.7V

For 3.0V USIM:

Vmax = 3.05V

Vmin = 2.7V

IOmax = 50mA

Either 1.8V or 3V is

supported by the

module automatically.

USIM_DATA

15

IO

Data signal of USIM

card.

For 1.8V USIM:

VILmax = 0.6V

VIHmin = 1.2V

VOLmax = 0.45V

VOHmin = 1.35V

For 3.0V USIM:

VILmax = 1.0V

VIHmin = 1.95V

VOLmax = 0.45V

VOHmin = 2.55V

Pull-up to USIM_VDD

with 15k resistor

internally.

USIM_CLK

16

DO

Clock signal of USIM

card.

For 1.8V USIM:

VOLmax = 0.45V

VOHmin = 1.35V

For 3.0V USIM:

VOLmax = 0.45V

VOHmin = 2.55V

USIM_RST

17

DO

Reset signal of

USIM card.

For 1.8V USIM:

VOLmax = 0.45V

VOHmin = 1.35V

For 3.0V USIM:

VOLmax = 0.45V

UC20 User Manual

UC20_Hardware_Design Confidential / Released 22 / 84

UMTS/HSPA Module Series

VOHmin = 2.55V

USIM_PRE

SENCE

13

DI

USIM card insertion

detection.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

If unused, keep it

open.

ADC Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

ADC0

45

AI

General purpose

analog to digital

converter.

Voltage range:

0.2V to 2.1V

If unused, keep it

open.

ADC1

44

AI

General purpose

analog to digital

converter.

Voltage range:

0.2V to 4.2V

If unused, keep it

open.

Main UART Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

RI

62

DO

Ring indicator.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

If unused, keep it

open.

DCD

63

DO

Data carrier

detection.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

If unused, keep it

open.

CTS

64

DO

Clear to send.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

If unused, keep it

open.

RTS

65

DI

Request to send.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

If unused, keep it

open.

DTR

66

DI

Data terminal ready,

sleep mode control.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

Pull-up by default.

Low level wakes up

the module. If

unused, keep it open.

TXD

67

DO

Transmit data.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

If unused, keep it

open.

RXD

68

DI

Receive data.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

1.8V power domain.

If unused, keep it

open.

UC20 User Manual

UC20_Hardware_Design Confidential / Released 23 / 84

UMTS/HSPA Module Series

VIHmax = 2.0V

Debug UART Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

DBG_TXD

12

DO

Transmit data.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain.

If unused, keep it

open.

DBG_RXD

11

DI

Receive data.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

If unused, keep it

open.

RF Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

ANT_DIV

35

AI

Diversity antenna.

50Ω impedance

If unused, keep it

open.

ANT_MAIN

49

IO

Main antenna.

50Ω impedance

ANT_GNSS

47

AI

GNSS antenna.

50Ω impedance

If unused, keep it

open.

PCM Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

PCM_IN

24

DI

PCM data input.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain. If unused, keep it open.

PCM_OUT

25

DO

PCM data output.

VOLmax = 0.45V

VOHmin = 1.35V

1.8V power domain. If unused, keep it open.

PCM_SYNC

26

IO

PCM data frame sync signal.

VOLmax = 0.45V

VOHmin = 1.35V

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain. In master mode, it is an output signal. In slave mode, it is an input signal. If unused, keep it open.

PCM_CLK

27

IO

PCM data bit clock.

VOLmax = 0.45V

VOHmin = 1.35V

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain. In master mode, it’s an output signal. In slave mode, it is an input signal. If unused, keep it open.

UC20 User Manual

UC20_Hardware_Design Confidential / Released 24 / 84

UMTS/HSPA Module Series

AGND

22

Reserved for analog

ground.

Ground.

If unused, connect

this pin to ground.

I2C Interface

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

I2C_SCL

41

OD

I2C serial clock.

External pull-up

resistor is required.

1.8V only. If unused,

keep it open.

I2C_SDA

42

OD

I2C serial data.

External pull-up

resistor is required.

1.8V only. If unused,

keep it open.

Other Pins

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

WAKEUP_IN

1

DI

Sleep mode control.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

Pull-up by default.

Low level wakes up

the module. If

unused, keep it open.

W_DISABLE#

4

DI

Airplane mode

control.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

Pull-up by default.

In low level voltage,

module can enter into

airplane mode. If

unused, keep it open.

AP_READY

2

DI

Application

processor sleep

state detection.

VILmin = -0.3V

VILmax = 0.6V

VIHmin = 1.2V

VIHmax = 2.0V

1.8V power domain.

If unused, keep it

open.

RESERVED Pins

Pin Name

Pin No.

I/O

Description

DC Characteristics

Comment

RESERVED

23,28~33

,37~40,

43,55,73

~84

Reserved

Keep these pins

unconnected.

UC20 User Manual

UC20_Hardware_Design Confidential / Released 25 / 84

UMTS/HSPA Module Series

Mode

Details

Normal Operation

GSM Idle

Software is active. The module has registered to the GSM network

and is ready to send and receive data.

GSM Talk/Data

GSM connection is ongoing. In this mode, the power consumption

is decided by the configuration of power control level (PCL),

dynamic DTX control and the working RF band.

GPRS Idle

The module is ready for GPRS data transfer, but no data transfer

is going on. In this case, power consumption depends on network

setting and GPRS configuration.

GPRS Data

There is GPRS data in transfer (PPP, TCP or UDP). In this mode,

power consumption is decided by the PCL, working RF band and

GPRS multi-slot configuration.

EDGE Idle

The module is ready for data transfer in EDGE mode, but no data

is currently sent or received. In this case, power consumption

depends on network settings and EDGE configuration.

EDGE Data

There is EDGE data in transfer (PPP, TCP or UDP). In this mode,

power consumption is decided by the PCL, working RF band and

EDGE multi-slot configuration.

UMTS Idle

Software is active. The module has registered to the UMTS

network and the module is ready to send and receive data.

UMTS

Talk/Data

UMTS connection is ongoing. In this mode, the power

consumption is decided by network setting (e.g. TPC pattern) and

data transfer rate.

HSPA Idle

Software is active. The module has registered to the HSPA

network and the module is ready to send and receive data.

HSPA Data

HSPA data transfer is ongoing. In this mode, the power

consumption is decided by network setting (e.g. TPC pattern) and

data transfer rate.

Minimum

Functionality

Mode

AT+CFUN command can set the module entering into a minimum functionality mode

without removing the power supply. In this case, both RF function and USIM card will

be invalid.

Airplane Mode

AT+CFUN command and W_DISABLE# pin can set the module entering into

airplane mode. In this case, RF function will be invalid.

UC20 User Manual

3.4. Operating Modes

The table below briefly summarizes the various operating modes referred to in the following chapters.

Table 5: Overview of Operating Modes

UC20_Hardware_Design Confidential / Released 26 / 84

UMTS/HSPA Module Series

Sleep Mode

In this mode, the current consumption of the module will be reduced to the minimal

level. During this mode, the module can still receive paging message, SMS, voice

call and TCP/UDP data from the network normally.

Power Down

Mode

In this mode, the power management unit shuts down the power supply. Only the

power supply for RTC remains. Software is not active. The serial interface is not

accessible. Operating voltage (connected to VBAT_RF and VBAT_BB) remains

applied.

RXD

TXD

RI

DTR

AP_READY

TXD

RXD

EINT

GPIO

Module

Processor

GND

UC20 User Manual

3.5. Power Saving

3.5.1. Sleep Mode

UC20 is able to reduce its current consumption to a minimum value during the sleep mode. The following

section describes UC20’s power saving procedure.

3.5.1.1. UART Application

If application processor communicates with module via UART interface, the following preconditions can

let the module enter into the sleep mode.

 Execute AT command AT+QSCLK=1 to enable the sleep mode.  Drive DTR to high level.

The following figure shows the connection between the module and application processor.

The RI of module is used to wake up the processor, and AP_READY will detect the sleep state of

processor (can be configured to high level or low level detection). You should pay attention to the level

Figure 3: UART Sleep Application

UC20_Hardware_Design Confidential / Released 27 / 84

UMTS/HSPA Module Series

USB_VBUS

USB_DP

USB_DM

AP_READY

VDD

USB_DP

USB_DM

GPIO

Module

Processor

GND

RI

EINT

UC20 User Manual

match shown in dotted line between module and processor.

Driving DTR to low level will wake up the module.

3.5.1.2. USB Application with Suspend Function

If application processor communicates with module via USB interface, and processor supports USB

suspend function, the following preconditions can let the module enter into the sleep mode.

 Execute AT command AT+QSCLK=1 to enable the sleep mode.  The processor’s USB bus which is connected with the module USB interface enters into suspended

state.

The following figure shows the connection between the module and processor.

Figure 4: USB Application with Suspend Function

When the processor’s USB bus returns to resume state, the module will be woken up.

3.5.1.3. USB Application without Suspend Function

If application processor communicates with module via USB interface, and processor does not support

USB suspend function, you should disconnect USB_VBUS with additional control circuit to let the module

enter into sleep mode.

 Execute AT command AT+QSCLK=1 to enable the sleep mode.  Disconnect USB_VBUS.

UC20_Hardware_Design Confidential / Released 28 / 84

UMTS/HSPA Module Series

USB_VBUS

USB_DP

USB_DM

AP_READY

VDD

USB_DP

USB_DM

GPIO

Module Processor

RI

EINT

Power

Switch

GPIO

GND

UC20 User Manual

The following figure shows the connection between the module and application processor.

Figure 5: USB Sleep Application without Suspend Function

Supply power to USB_VBUS will wake up the module.

In sleep mode, module can still receive paging, SMS, voice call and TCP/UDP data from network, but the

UART port is not accessible. When the module enters into the sleep mode, the SLEEP_IND will output a

high logic level.

For more details about power saving mode, please refer to document [8].

3.5.2. Airplane Mode

When module enters into the airplane mode, the RF function does not work, and all AT commands

correlative with RF function will be not accessible. This mode can be set with the following way.

Hardware:

The W_DISABLE# pin is pulled up by default, drive it to low level will let the module enter into airplane

mode.

Software:

Command AT+CFUN provides the choice of the functionality level <fun>=0, 1, 4.

AT+CFUN=0: Minimum functionality mode, both USIM and RF function are disabled.

AT+CFUN=1: Full functionality mode (by default).

AT+CFUN=4: Airplane mode. RF function is disabled.

UC20_Hardware_Design Confidential / Released 29 / 84

UMTS/HSPA Module Series

1. The W_DISABLE# control function is disabled in firmware by default. It can be enabled by AT

command AT+QCFG=“airplanecontrol”. Refer to document [1].

2. When the module is in sleep mode, the W_DISABLE# control is invalid. Please be sure to wake the

module up first.

3. GNSS function is still available when RF function is disabled.

Pin Name

Pin No.

Description

Min.

Typ.

Max.

Unit

VBAT_RF

57,58

Power supply for module RF

part.

3.3

3.8

4.3 V VBAT_BB

59,60

Power supply for module

baseband part.

3.3

3.8

4.3

V

GND

8,9,19,36,46,

48,50~54,56,

72, 85~112

Ground.

- 0 -

V

NOTES

UC20 User Manual

3.6. Power Supply

3.6.1. Power Supply Pins

UC20 provides four VBAT pins dedicated to connect with the external power supply. There are two

separate voltage domains for VBAT.

 VBAT_RF with two pads for module RF part.  VBAT_BB with two pads for module baseband part.

The following table shows the VBAT pins and ground pins.

Table 6: VBAT and GND Pins

3.6.2. Decrease Voltage Drop

The power supply range of the module is 3.3V ~ 4.3V. Make sure the input voltage will never drop below

3.3V. If the voltage drops below 3.3V, the module will turn off automatically. The following figure shows the

voltage drop during transmitting burst in 2G network, the voltage drop will be less in 3G network.

UC20_Hardware_Design Confidential / Released 30 / 84

UMTS/HSPA Module Series

< 400mV

Current

VBAT

≤ 2.0A

burst

Min. 3.3V

Module

VBAT_RF

VBAT_BB

VBAT

C1

100uF

C6

100nFC733pFC810pF

+

C2

100nF

C5

100uF

C3

33pF

C4

10pF

D1

5.1V

UC20 User Manual

Figure 6: Voltage Drop during Transmitting Burst

To decrease voltage drop, a bypass capacitor of about 100µF with low ESR should be used. Multi-layer

ceramic chip (MLCC) capacitor can provide the best combination of low ESR. The main power supply

from an external application has to be a single voltage source and expanded to two sub paths with star

structure. The width of VBAT_BB trace should be no less than 1mm, and the width of VBAT_RF trace

should be no less than 2mm, and the principle of the VBAT trace is the longer, the wider.

Three ceramic capacitors (100nF, 33pF, 10pF) are recommended to be applied to the VBAT pins. The

capacitors should be placed close to the UC20’s VBAT pins. In addition, in order to get a stable power

source, it is suggested to use a zener diode of which reverse zener voltage is 5.1V and dissipation power

is more than 0.5W. The following figure shows star structure of the power supply.

Figure 7: Star Structure of the Power Supply

3.6.3. Reference Design for Power Supply

The power design for the module is very important, since the performance of power supply for the module

largely depends on the power source. The power supply is capable of providing the sufficient current up to

UC20_Hardware_Design Confidential / Released 31 / 84

UMTS/HSPA Module Series

DC_IN

C1

C2

MIC29302WU U1

IN

OUT

EN

GND

ADJ

2 4

1

3

5

VBAT

100nF

C3

470uFC4100nF

R2

100K

47K

R3

470uF

470R

51K

R4

R1

1%

Pin Name

Pin No.

Description

DC Characteristics

Comment

PWRKEY

21

Turn on/off the module.

VIHmax = 2.1V

VIHmin = 1.3V

VILmax = 500mV

Pull-up to 1.8V internally

with 200kΩ resistor.

UC20 User Manual

2A at least. If the voltage drop between the input and output is not too high, it is suggested to use a LDO

to supply power for module. If there is a big voltage difference between the input source and the desired

output (VBAT), a buck converter is preferred to be used as a power supply.

The following figure shows a reference design for +5V input power source. The designed output for the

power supply is about 3.8V and the maximum load current is 3A.

Figure 8: Reference Circuit of Power Supply

3.6.4. Monitor the Power Supply

You can use the AT+CBC command to monitor the VBAT_BB voltage value. For more details, please

refer to document [1].

3.7. Turn on and off Scenarios

3.7.1. Turn on Module Using the PWRKEY

The following table shows the pin definition of PWRKEY.

Table 7: PWRKEY Pin Description

When UC20 is in power down mode, it can be turned on to normal mode by driving the PWRKEY pin to a

low level at least 100ms. It is recommended to use an open drain/collector driver to control the PWRKEY.

After STATUS pin (require external pull-up) outputting a low level, PWRKEY pin can be released. A simple

UC20_Hardware_Design Confidential / Released 32 / 84

UMTS/HSPA Module Series

Turn on pulse

PWRKEY

4.7K

47K

≥ 100ms

PWRKEY

S1

Close to S1

TVS

UC20 User Manual

reference circuit is illustrated in the following figure.

Figure 9: Turn on the Module Using Driving Circuit

The other way to control the PWRKEY is using a button directly. A TVS component is indispensable to be

placed nearby the button for ESD protection. When pressing the key, electrostatic strike may generate

from finger. A reference circuit is showed in the following figure.

The turn on scenarios is illustrated as the following figure.

UC20_Hardware_Design Confidential / Released 33 / 84

Figure 10: Turn on the Module Using Keystroke

UMTS/HSPA Module Series

V

IL

≤ 0.5V

V

IH

≥ 1.3V

VBAT

PWRKEY

≥ 100ms

1

RESET_N

STATUS (OD)

1.3 ~ 1.9s

Inactive

UART

Active

≥ 5s

Inactive

Active

USB

≥ 5s

Make sure that VBAT is stable before pulling down PWRKEY pin. The time between them is

recommended to be 30ms.

NOTE

UC20 User Manual

Figure 11: Timing of Turning on Module

3.7.2. Turn off Module

The following procedures can be used to turn off the module:

 Normal power down procedure: Turn off the module using the PWRKEY pin.  Normal power down procedure: Turn off the module using command AT+QPOWD.  Automatic shutdown: Turn off the module automatically if under-voltage or over-voltage is detected.

3.7.2.1. Turn off Module Using the PWRKEY Pin

Driving the PWRKEY to a low level voltage at least 0.6s, the module will execute power-down procedure

after PWRKEY is released. The power-down scenario is illustrated as the following figure.

UC20_Hardware_Design Confidential / Released 34 / 84

UMTS/HSPA Module Series

VBAT

PWRKEY

Log off network about 1s to 60s

≥ 0.6s

RUNNING

Power-down procedure

OFF

Module Status

STATUS (OD)

UC20 User Manual

Figure 12: Timing of Turning off Module

During power-down procedure, module will send out URC “NORMAL POWER DOWN” via URC port first,

then log off network and save important data. After logging off, module sends out “POWERED DOWN”

and shut down the internal power supply. The power on VBAT pins is not allowed to turn off before the

URC “POWERED DOWN” is output to avoid data loss. If logging off is not done within 60s, module will

shut down internal power supply forcibly.

After that moment, the module enters the power down mode, no other AT commands can be executed

and only the RTC is still active.

3.7.2.2. Turn off Module Using AT Command

It is also a safe way to use AT command AT+QPOWD to turn off the module, which is similar to turning off

the module via PWRKEY Pin.

Please refer to document [1] for details about the AT command of AT+QPOWD.

3.7.2.3. Automatic Shutdown

The module will constantly monitor the voltage applied on the VBAT, if the voltage ≤ 3.5V, the following

URC will be presented:

+QIND: “vbatt”,-1

If the voltage ≥ 4.21V, the following URC will be presented:

+QIND: “vbatt”,1

UC20_Hardware_Design Confidential / Released 35 / 84

UMTS/HSPA Module Series

The value of voltage threshold can be revised by command AT+QCFG=“vbatt”, refer to document [1]

for details.

Pin Name

Pin No.

Description

DC Characteristics

Comment

RESET_N

20

Reset the module.

VIHmax = 2.1V

VIHmin = 1.3V

VILmax = 500mV

Pull-up to 1.8V internally

with 200kΩ resistor.

Active low.

NOTE

UC20 User Manual

The uncritical voltage is 3.3V to 4.35V, If the voltage > 4.35V or < 3.3V the module would automatically

shut down itself.

If the voltage < 3.3V, the following URC will be presented:

+QIND: “vbatt”,-2

If the voltage > 4.35V, the following URC will be presented:

+QIND: “vbatt”,2

3.8. Reset the Module

The RESET_N can be used to reset the module.

Table 8: RESET_N Pin Description

You can reset the module by driving the RESET_N to a low level voltage for more than 150ms and then

releasing.

The recommended circuit is similar to the PWRKEY control circuit. You can use open drain/collector

driver or button to control the RESET_N.

UC20_Hardware_Design Confidential / Released 36 / 84

UMTS/HSPA Module Series

Reset pulse

RESET_N

4.7K

47K

≥ 150ms

RESET_N

S2

Close to S2

TVS

VIL ≤ 0.5V

VIH ≥ 1.3V

VBAT

150ms

RESETTING

Module Status

RUNNING

RESET_N

RUNNING

≥ 5s

Use the RESET_N only when turning off the module by the command AT+QPOWD and the PWRKEY pin

failed.

NOTE

UC20 User Manual

Figure 13: Reference Circuit of RESET_N by Using Driving Circuit

Figure 14: Reference Circuit of RESET_N by Using Button

The reset scenario is illustrated as the following figure.

Figure 15: Timing of Resetting Module

UC20_Hardware_Design Confidential / Released 37 / 84

UMTS/HSPA Module Series

Module

RTC Core

R

VRTC

Non-chargeable Battery

Rechargeable Battery

Module

RTC

Core

R

VRTC

UC20 User Manual

3.9. RTC Backup

The RTC (Real Time Clock) can be powered by an external power source through the pin VRTC when the

module is powered down and there is no power supply for the VBAT. It is also available to charge the

battery on the VRTC when module is turned on. You can choose rechargeable battery, capacitor or

non-rechargeable battery depending on different applications.

The following figures show the various sample circuits for VRTC backup.

Figure 16: RTC Supply from Non-chargeable Battery

Figure 17: RTC Supply from Rechargeable Battery

UC20_Hardware_Design Confidential / Released 38 / 84

UMTS/HSPA Module Series

Large Capacitance Capacitor

Module

RTC

Core

R

VRTC

USB interface supports software debug and firmware upgrade by default.

Pin Name

Pin No.

I/O

Description

Comment

RI

62

DO

Ring indicator.

1.8V power domain.

DCD

63

DO

Data carrier detection.

1.8V power domain.

CTS

64

DO

Clear to send.

1.8V power domain.

NOTE

UC20 User Manual

Figure 18: RTC Supply from Capacitor

3.10. UART Interface

The module provides two UART interfaces: main UART interface and debug UART interface. The

following shows the different features.

 Main UART interface supports 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600bps

baud rate, the default is 115200bps. This interface can be used for data transmission, AT

communication or firmware upgrade.

 Debug UART interface supports 115200bps. It can be used for GNSS NMEA sentences output.

The module is designed as the DCE (Data Communication Equipment), following the traditional

DCE-DTE (Data Terminal Equipment) connection. The following tables show the pin definition of these

two UART interfaces.

Table 9: Pin Definition of the Main UART Interface

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UMTS/HSPA Module Series

RTS

65

DI

Request to send.

1.8V power domain.

DTR

66

DI

Data terminal ready.

1.8V power domain.

TXD

67

DO

Transmit data.

1.8V power domain.

RXD

68

DI

Receive data.

1.8V power domain.

Pin Name

Pin No.

I/O

Description

Comment

DBG_TXD

12

DO

Transmit data.

1.8V power domain.

DBG_RXD

11

DI

Receive data.

1.8V power domain.

Parameter

Min

Max

Unit

VIL

-0.3

0.6

V

VIH

1.2

2.0

V

VOL 0 0.45

V

VOH

1.35

1.8

V

UC20 User Manual

Table 10: Pin Definition of the Debug UART Interface

The logic levels are described in the following table.

Table 11: Logic Levels of Digital I/O

UC20 provides 1.8V UART interface. A level translator should be used if your application is equipped with

a 3.3V UART interface. A level translator TXS0108PWR provided by Texas Instrument is recommended.

The following figure shows the reference design.

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UMTS/HSPA Module Series

VCCA VCCB

OE

A1

A2

A3

A4

A5

A6

A7

A8

GND

B1

B2

B3

B4

B5

B6

B7

B8

VDD_EXT

RI

DCD

RTS

RXD

DTR

CTS

TXD

51K

0.1uF

RI_3.3V

DCD_3.3V

RTS_3.3V

RXD_3.3V

DTR_3.3V

CTS_3.3V

TXD_3.3V

VDD_3.3V

Translator

MCU/ARM

/TXD

/RXD

VDD_EXT

4.7K

VCC_MCU

4.7K

VDD_EXT

TXD

RXD

RTS CTS DTR

RI

/RTS /CTS

GND

GPIO DCD

Module

GPIO

EINT

VDD_EXT

4.7K

GND

1nF

UC20 User Manual

Figure 19: Reference Circuit with Translator Chip

Please visit http://www.ti.com for more information.

Another example with transistor translation circuit is shown as below. The construction of dotted line can

refer to the construction of solid line. Please pay attention to direction of connection. Input dotted line of

module should refer to input solid line of the module. Output dotted line of module should refer to output

solid line of the module.

The following figure is an example of connection between UC20 and PC. A voltage level translator and a

RS-232 level translator chip must be inserted between module and PC, since these two UART interfaces

do not support the RS-232 level, while support the 1.8V CMOS level only.

UC20_Hardware_Design Confidential / Released 41 / 84

Figure 20: Reference Circuit with Transistor Circuit

UMTS/HSPA Module Series

TXS0108PWR

DCD_3.3V

RTS_3.3V

DTR_3.3V

RXD_3.3V

RI_3.3V

CTS_3.3V

TXD_3.3V

DCD

RTS

DTR

RXD

RI

CTS

TXD

DCD_1.8V

RTS_1.8V

DTR_1.8V

RXD_1.8V

RI_1.8V

CTS_1.8V

TXD_1.8V

VCCA

Module

GND GND

VDD_EXT VCCB

3.3V

DIN1

ROUT3

ROUT2

ROUT1

DIN4

DIN3

DIN2

DIN5

R1OUTB

FORCEON

/FORCEOFF

/INVALID

3.3V

DOUT1 DOUT2

DOUT3 DOUT4 DOUT5

RIN3

RIN2

RIN1

VCC GND

OE

SN65C3238

DB-9

Connect to PC

DCD

RTS

DTR

TXD

RI

CTS

RXD

DSR

GND

1 2

3 4

5

6

7

8

9

1. The module disables the hardware flow control by default. When hardware flow control is required,

RTS and CTS should be connected to the host. AT command AT+IFC=2,2 is used to enable

hardware flow control. AT command AT+IFC=0,0 is used to disable the hardware flow control. For

more details, please refer to document [1].

2. Rising edge on DTR will let the module exit from the data mode by default. It can be disabled by AT

commands. Refer to document [1] about the command AT&D and AT&V for details.

3. DCD is used as data mode indication. Refer to document [1] about the command AT&C and AT&V

for details.

Pin Name

Pin No.

I/O

Description

Comment

USIM_VDD

14

PO

Power supply for USIM card.

Either 1.8V or 3.0V is supported

by the module automatically.

USIM_DATA

15

IO

Data signal of USIM card.

Pull-up to USIM_VDD with 15k

resistor internally.

NOTES

UC20 User Manual

Figure 21: RS232 Level Match Circuit

3.11. USIM Card Interface

The USIM card interface circuitry meets ETSI and IMT-2000 SIM interface requirements. Both 1.8V and

3.0V USIM cards are supported.

Table 12: Pin Definition of the USIM Interface

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UMTS/HSPA Module Series

USIM_CLK

16

DO

Clock signal of USIM card.

USIM_RST

17

DO

Reset signal of USIM card.

USIM_PRES

ENCE

13

DI

USIM card insertion detection.

1.8V power domain. USIM_GND

10 Specified ground for USIM card.

Module

USIM_VDD

USIM_GND

USIM_RST

USIM_CLK

USIM_DATA

USIM_PRESENCE

22R

VDD_EXT

51K

100nF USIM Connector

GND

33pF

33pF 33pF

VCC RST

CLK

IO

VPP

GND

USIM_VDD

15K

Some AT commands are invalid when USIM card is not applied.

NOTE

UC20 User Manual

The following figure shows the reference design of the 8-pin USIM card.

Figure 22: Reference Circuit of the 8 Pin USIM Card

UC20 supports USIM card hot-plugging via the USIM_PRESENCE pin. For details, refer to document [1]

about the command AT+QSIMDET. If you do not need the USIM card detection function, keep

USIM_PRESENCE unconnected. The reference circuit for using a 6-pin USIM card connector is

illustrated as the following figure.

UC20_Hardware_Design Confidential / Released 43 / 84

UMTS/HSPA Module Series

Module

USIM_VDD

USIM_GND

USIM_RST USIM_CLK

USIM_DATA

22R

100nF

USIM Connector

GND

33pF 33pF 33pF

VCC RST CLK IO

VPP

GND

15K

USIM_VDD

UC20 User Manual

Figure 23: Reference Circuit of the 6 Pin USIM Card

In order to enhance the reliability and availability of the USIM card in your application, please follow the

following criterion in the USIM circuit design:

 Keep layout of USIM card as close as possible to the module. Assure the length of the trace is less

than 200mm.

 Keep USIM card signal away from RF and VBAT alignment.  Assure the ground between module and USIM connector short and wide. Keep the width of ground

and USIM_VDD no less than 0.5mm to maintain the same electric potential. The decouple capacitor

of USIM_VDD should be less than 1uF and must be near to USIM connector.

 To avoid cross-talk between USIM_DATA and USIM_CLK, keep them away with each other and

shield them with surrounded ground.

 In order to offer good ESD protection, it is recommended to add TVS. The 22Ω resistors should be

added in series between the module and the USIM card so as to suppress the EMI spurious

transmission and enhance the ESD protection. The 33pF capacitors are used for filtering interference

of EGSM900. Please note that the USIM peripheral circuit should be close to the USIM connector.

 The pull-up resistor on USIM_DATA line can improve anti-jamming capability when long layout trace

and sensitive occasion is applied, and should be placed close to the USIM connector.

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UMTS/HSPA Module Series

Pin Name

Pin No.

I/O

Description

Comment

USB_DP

69

IO

USB differential data bus (positive).

Require differential

impedance of 90Ω.

USB_DM

70

IO

USB differential data bus (minus).

Require differential

impedance of 90Ω.

USB_VBUS

71

PI

Used for detecting the USB interface

connected.

3.0~5.25V.

Typical 5.0V.

GND

72 Ground.

Module

USB_VBUS

USB_DP

USB_DM

GND

USB connector

Close to USB connector

Differential layout

USB_VBUS

USB_DP

USB_DM

GND

ESD Array

NM_2pF

UC20 User Manual

3.12. USB Interface

UC20 contains one integrated Universal Serial Bus (USB) transceiver which complies with the USB 2.0

specification and supports high speed (480 Mbps), full speed (12 Mbps) and low speed (1.5 Mbps) mode.

The USB interface is primarily used for AT command, data transmission, GNSS NMEA sentences output,

software debug and firmware upgrade. The following table shows the pin definition of USB interface.

Table 13: USB Pin Description

More details about the USB 2.0 specifications, please visit http://www.usb.org/home.

The following figure shows the reference circuit of USB interface.

Figure 24: Reference Circuit of USB Application

In order to ensure the USB interface design corresponding with the USB 2.0 specification, please comply

with the following principles.

UC20_Hardware_Design Confidential / Released 45 / 84

UMTS/HSPA Module Series

UC20 module can only be used as a slave device.

Module

USB_DM

USB_DP

VBAT_BB

USB_VBUS

PWRKEY

GND

VBAT_RF

USB_DM

USB_DP

VBAT

USB_VBUS

PWRKEY

GND

Connector

NOTE

UC20 User Manual

 It is important to route the USB signal traces as differential pairs with total grounding. The impedance

of USB differential trace is 90ohm.

 Do not route signal traces under crystals, oscillators, magnetic devices and RF signal traces. It is

important to route the USB differential traces in inner-layer with ground shielding not only upper and

lower layer but also right and left side.

 Pay attention to the influence of junction capacitance of ESD component on USB data lines. Typically,

the capacitance value should be less than 2pF.

 Keep the ESD components as closer to the USB connector as possible.

The USB interface is recommended to be reserved for firmware upgrade in your design. The following

figure shows the recommended test points.

Figure 25: Test Points of Firmware Upgrade

3.13. PCM and I2C Interface

UC20 provides one Pulse Code Modulation (PCM) digital interface for audio design, which supports the

following modes:

 Primary mode (short sync, works as both master and slave)  Auxiliary mode (long sync, works as master only)

UC20_Hardware_Design Confidential / Released 46 / 84

UMTS/HSPA Module Series

PCM_CLK

PCM_SYNC

PCM_OUT

MSB

LSB

MSB

LSB

MSB

PCM_IN

125us

1 2 256255

PCM_CLK

PCM_SYNC

PCM_OUT

MSB

LSB

PCM_IN

125us

MSB

1 2 1615

LSB

UC20 User Manual

In primary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising

edge; the PCM_SYNC falling edge represents the MSB. In this mode, PCM_CLK supports 128, 256, 512,

1024, 2048 and 4096kHz for different speech codec.

In auxiliary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising

edge; while the PCM_SYNC rising edge represents the MSB. In this mode, PCM interface operates with a

128kHz PCM_CLK and an 8kHz, 50% duty cycle PCM_SYNC only.

UC20 supports 8-bit A-law and μ-law, and also 16-bit linear data formats. The following figures show the

primary mode’s timing relationship with 8kHz PCM_SYNC and 2048kHz PCM_CLK and auxiliary mode’s

timing relationship with 8kHz PCM_SYNC and 128kHz PCM_CLK.

Figure 26: Primary Mode Timing

Figure 27: Auxiliary Mode Timing

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UMTS/HSPA Module Series

Pin Name

Pin No.

I/O

Description

Comment

PCM_IN

24

DI

PCM data input.

1.8V power domain.

PCM_OUT

25

DO

PCM data output.

1.8V power domain.

PCM_SYNC

26

IO

PCM data frame sync signal.

1.8V power domain.

PCM_CLK

27

IO

PCM data bit clock.

1.8V power domain.

I2C_SCL

41

OD

I2C serial clock.

Require external pull-up

resistor. 1.8V only.

I2C_SDA

42

OD

I2C serial data.

Require external pull-up

resistor. 1.8V only.

PCM_IN

PCM_OUT

PCM_SYNC

PCM_CLK

I2C_SCL

I2C_SDA

NAU8814

Module

1.8V

4.7K

BCLK

MCLK

FS

DACIN

ADCOUT

SCLK

SDIN

BIAS

MIC_BIAS

MIC+

MIC-

SPKOUT+

SPKOUT-

UC20 User Manual

The following table shows the pin definition of PCM and I2C interface which can be applied on audio

codec design.

Table 14: Pin Definition of PCM and I2C Interface

Clock and mode can be configured by AT command, and the default configuration is master mode using

short sync data format with 2048kHz PCM_CLK and 8kHz PCM_SYNC. In addition, UC20’s firmware has

integrated the configuration on NAU8814 application with I2C interface. Refer to document [1] about the

command AT+QDAI for details.

The following figure shows the reference design of PCM interface with external codec IC.

Figure 28: Reference Circuit of PCM Application with Audio Codec

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UMTS/HSPA Module Series

1. It is recommended to reserved RC (R=22Ω, C=22pF) circuit on the PCM lines, especially for

PCM_CLK.

2. UC20 works as a master device pertaining to I2C interface.

Pin Name

Pin No.

Description

ADC0

45

General purpose analog to digital converter.

ADC1

44

General purpose analog to digital converter.

Parameter

Min.

Typ.

Max.

Unit

ADC0 Voltage Range

0.2 2.1 V ADC1 Voltage Range

0.2 4.2 V ADC Resolution

15 bits

Offset Error

3.5 %

Gain Error

2.5 %

NOTES

UC20 User Manual

3.14. ADC Function

The module provides two analog-to-digital converters (ADC) to digitize the analog signal to 15-bit digital

data such as battery voltage, temperature and so on. Using AT command AT+QADC=0 can read the

voltage value on ADC0 pin. Using AT command AT+QADC=1 can read the voltage value on ADC1 pin.

For more details of these AT commands, please refer to document [1].

In order to improve the accuracy of ADC, the trace of ADC should be surrounded by ground.

Table 15: Pin Definition of the ADC

The following table describes the characteristic of the ADC function.

Table 16: Characteristic of the ADC

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UMTS/HSPA Module Series

Pin Name

Pin No.

I/O

Description

Comment

NET_MODE

5

DO

Indicate the module network

registration mode.

1.8V power domain

NET_STATUS

6

DO

Indicate the module network activity

status.

1.8V power domain

Pin Name

Status

Description

NET_MODE Always High

Registered in 3G network

Always Low

Others

NET_STATUS

Flicker slowly (200ms High/1800ms Low)

Network searching

Flicker slowly (1800ms High/200ms Low)

Idle

Flicker quickly (125ms High/125ms Low)

Data transfer is ongoing

Always High

Voice calling

4.7K

47K

VBAT

2.2K

Module

Network Indicator

UC20 User Manual

3.15. Network Status Indication

The network indication pins can be used to drive a network status indicator LED. The module provides

two pins which are NET_MODE and NET_STATUS. The following tables describe pin definition and logic

level changes in different network status.

Table 17: Pin Definition of Network Indicator

Table 18: Working State of the Network Indicator

A reference circuit is shown in the following figure.

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UMTS/HSPA Module Series

Pin Name

Pin No.

I/O

Description

Comment

STATUS

61

OD

Indicate the module operation status.

Require external pull-up.

VDD_MCU

10K

Module

STATUS MCU_GPIO

Module

STATUS

VBAT

2.2K

UC20 User Manual

Figure 29: Reference Circuit of the Network Indicator

3.16. Operating Status Indication

3.16.1. STATUS

The STATUS pin is an open drain output for indicating the module operation status. You can connect it to

a GPIO of DTE with pulled up, or as LED indication circuit as below. When the module is turned on

normally, the STATUS will present the low state. Otherwise, the STATUS will present high-impedance

state.

Table 19: Pin Definition of STATUS

The following figure shows different design circuit of STATUS, you can choose either one according to

your application demands.

Figure 30: Reference Circuit of the STATUS

3.16.2. SLEEP_IND

The SLEEP_IND is an indicated pin for judging whether the module is in sleep mode or not. When the

module enters into the sleep mode, the SLEEP_IND will output a logic high level. So you can use the

SLEEP_IND for low current indication. The following table shows the pin definition of SLEEP_IND.

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UMTS/HSPA Module Series

Pin Name

Pin No.

I/O

Description

Comment

SLEEP_IND

3

DO

Indicate the sleep status.

1.8V power domain.

Outputs high level when the

module is in sleep mode.

4.7K

47K

VBAT

2.2K

Module

SLEEP_IND

Paging

Sleep

T

Sleep Sleep

Paging

Sleep

Paging

T

UC20 User Manual

Table 20: Pin Definition of SLEEP_IND

A reference circuit is shown in the following figure.

Module still periodically monitors the paging channel of the current base station (paging block reception)

during the sleep mode. When the module monitors the paging channel, it wakes up to active mode, to

enable the reception of paging block. In between, the module switches to sleep mode.

The following figure shows the paging timing cycle (T) during sleep mode.

Figure 31: Reference Circuit of the SLEEP_IND

Figure 32: Relationship between Sleep and Network Paging

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UMTS/HSPA Module Series

URC can be output from UART port, USB AT port and USB modem port by command AT+QURCCFG.

The default port is USB AT port.

State

Response

Idle

RI keeps high level.

URC

RI outputs 120ms low pulse when new URC returns.

NOTE

UC20 User Manual

As to GSM network, the paging period time can be calculated with the following formula.

T= 4.615ms × 51 × DRX

As to WCDMA network, the paging period time can be calculated with the following formula.

T= 10ms × 2

DRX

DRX (Discontinuous Reception) is a value from 2 to 9 in GSM network, resulting in paging intervals

470.6ms to 2118.42ms, and a value from 6 to 9 in WCDMA network, resulting in paging intervals from

640ms to 5120ms.

3.17. Behavior of the RI

You can use command AT+QCFG=“risignaltype”, “physical” to configure RI behavior:

No matter which port URC is presented on, URC will trigger the behavior on RI pin.

In additional, RI behavior can be configured flexible. The default behavior of the RI is shown as below.

Table 21: Behavior of the RI

The RI behavior can be changed by command AT+QCFG=“urc/ri/ring”, refer to document [1] for

details.

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UMTS/HSPA Module Series

UC20 User Manual

4 GNSS Receiver

4.1. General Description

UC20 includes a fully integrated global navigation satellite system solution that supports the latest

generation gpsOne Gen8 of Qualcomm (GPS and GLONASS). Compared with GPS only, dual systems

increase usable constellation, reduce coverage gaps and TTFF, and increase positioning accuracy,

especially in rough urban environments.

UC20 works in standalone mode, allows device to demodulate GNSS assistance data, calculate position

without any assistance from the network, suitable for various application needing lowest-cost, accurate

position determination. UC20 supports Qualcomm gpsOneXTRA technology (one kind of A-GNSS), which

will download XTRA file from the internet server to enhance the TTFF. XTRA file contains predicted GPS

and GLONASS satellites coordinates and clock biases valid for up to 7days. It is the best if XTRA file is

downloaded once every 1-2 days. And UC20 also supports SBAS (including WAAS, EGNOS and MSAS),

which will improve fix accuracy.

UC20 provides power-saving solution named DPO (Dynamic Power Optimization), which attempts to turn

off GNSS RF parts, reduces current consumption by 50% at most without impact on TTFF, thus extends

battery life, and maximizes talk and standby time as well.

UC20 supports standard NMEA-0183 protocol, and outputs NMEA sentences with 1Hz via USB interface

by default.

By default, UC20 GNSS engine is switched off, it has to be switched on with AT command. For more

details about GNSS engine technology and configurations, refer to document [7].

UC20_Hardware_Design Confidential / Released 54 / 84

UMTS/HSPA Module Series

Parameter

Description

Conditions

Typ.

Unit

Sensitivity

(GNSS)

Cold start Autonomous

-144

dBm

With LNA

-147

dBm

Reacquisition Autonomous

-154

dBm

With LNA

-159

dBm

Tracking Autonomous

-155

dBm

With LNA

-161

dBm

TTFF

(GNSS)

Cold start

@open sky Autonomous

32 s XTRA enabled

22

s

Warm start

@open sky Autonomous

29 s XTRA enabled

3

s

Hot start

@open sky Autonomous

2.5 s XTRA enabled

2

s

Accuracy

(GNSS)

CEP-50

Autonomous

@open sky

<1.5

m

1. Tracking sensitivity: the lowest GPS signal value at the antenna port for which the module can keep

on positioning for 3 minutes.

2. Reacquisition sensitivity: the lowest GPS signal value at the antenna port for which the module can

fix position again within 3 minutes after loss of lock.

3. Cold start sensitivity: the lowest GPS signal value at the antenna port for which the module fixes

position within 3 minutes after executing cold start command.

NOTES

UC20 User Manual

4.2. GNSS Performance

The following table shows UC20 GNSS performance.

Table 22: GNSS Performance

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UMTS/HSPA Module Series

UC20 User Manual

4.3. Layout Guideline

The following layout guideline should be taken into account in your design.

 Maximize the distance between the GNSS antenna and the main GSM/UMTS antenna.  Noisy digital circuits such as the USIM card, USB interface, Camera module, Display connector and

SD card should be away from the antenna.

 Use ground vias around the GNSS trace and sensitive analog signal traces to provide coplanar

isolation and protection.

 Keep 50 ohm characteristic impedance of the ANT_GNSS trace.

Refer to Chapter 5 for GNSS reference design and antenna consideration.

UC20_Hardware_Design Confidential / Released 56 / 84

UMTS/HSPA Module Series

Pin Name

Pin No.

I/O

Description

Comment

ANT_MAIN

49

IO

Main antenna

50Ω impedance

ANT_DIV

35

AI

Diversity antenna

50Ω impedance

Band

Receive

Transmit

Unit

GSM850

869 ~ 894

824 ~ 849

MHz

EGSM900

925 ~ 960

880 ~ 915

MHz

DCS1800

1805 ~ 1880

1710 ~ 1785

MHz

PCS1900

1930 ~ 1990

1850 ~ 1910

MHz

UMTS 2100

2110 ~ 2170

1920 ~ 1980

MHz

UMTS 1900

1930 ~ 1990

1850 ~ 1910

MHz

UC20 User Manual

5 Antenna Interface

UC20 antenna interface includes a main GSM/UMTS antenna, an optional UMTS Rx-diversity antenna,

which is used to improve UMTS’s receiving performance, and a GNSS antenna. The antenna interface

has an impedance of 50Ω.

5.1. GSM/UMTS Antenna Interface

5.1.1. Pin Definition

The main antenna and UMTS Rx-diversity antenna pins definition are shown below.

Table 23: Pin Definition of the RF Antenna

5.1.2. Operating Frequency

Table 24: The Module Operating Frequencies

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UMTS/HSPA Module Series

UMTS 900

925 ~ 960

880 ~ 915

MHz

UMTS 850

869 ~ 894

824 ~ 849

MHz

UMTS 800

875 ~ 885

830 ~ 840

MHz

ANT_MAIN

R1 0R

C1

Module

Main antenna

NM

C2

NM

R2 0R

C3

Diversity antenna

NM

C4

NM

ANT_DIV

Keep a proper distance between main antenna and diversity antenna to improve the receiving sensitivity.

NOTE

UC20 User Manual

5.1.3. Reference Design

The reference design of main antenna and UMTS Rx-diversity antenna is shown as below. It should

reserve a π-type matching circuit for better RF performance. The capacitors are not mounted by default.

Figure 33: Reference Circuit of Antenna Interface

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UMTS/HSPA Module Series

Pin Name

Pin No.

I/O

Description

Comment

ANT_GNSS

47

AI

GNSS antenna

50Ω impedance

Type

Frequency

Unit

GPS

1575.42±1.023

MHz

GLONASS

1597.5 ~ 1605.8

MHz

Passive

antenna

MAX2659

Module

ANT_GNSS

/SHDN

GND

RFIN

GND

RFOUT

VCC

VDD

MCU_GPIO

100pF

6.8nH

220nF

33pF

51K

NM

56pF

D1

UC20 User Manual

5.2. GNSS Antenna Interface

The following tables show the GNSS antenna pin definition and frequency specification.

Table 25: Pin Definition of GNSS Antenna

Table 26: GNSS Frequency

5.2.1. Reference Design for Passive Antenna

Figure 34: Reference Circuit of GNSS Passive Antenna

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UMTS/HSPA Module Series

Active antenna

VDD

Module

ANT_GNSS

47nH

10R

0.1uF

100pF

NMNM

1. You can choose the corresponding reference circuit above according to your demands on antenna

circuit design.

2. MAX2659 is the recommended LNA chip. You can disable LNA to save power with one GPIO

shown in above figure. Pay attention to this pin’s voltage level.

3. VDD supplies power for active antenna. You can choose the right VDD according to the requirements

for active antenna. This power circuit is not needed if passive antenna is applied here.

4. All NM capacitors are reserved for adjusting RF performance.

5. The capacitance of ESD component D1 should be less than 1pF.

NOTES

UC20 User Manual

5.2.2. Reference Design for Active Antenna

5.3. Antenna Installation

Figure 35: Reference Circuit of GNSS Active Antenna

5.3.1. Antenna Requirement

The following table shows the requirement on GSM/UMTS antenna and GNSS antenna.

UC20_Hardware_Design Confidential / Released 60 / 84

UMTS/HSPA Module Series

Type

Requirements

GNSS

Frequency range: 1565~1607 MHz

Polarization: RHCP or linear

VSWR: < 2 (Typ.)

Passive antenna gain: > 0dBi

Active antenna noise figure: < 1.5dB

Active antenna gain: > -2dBi

Active antenna embedded LNA gain: 20dB (Typ.)

Active antenna total gain: > 18dBi (Typ.)

GSM/UMTS

VSWR: ≤ 2

Gain (dBi): 1

Max Input Power (W): 50

Input Impedance (ohm): 50

Polarization Type: Vertical

Cable Insertion Loss: < 1dB (GSM850/900, UMTS800/850/900)

Cable Insertion Loss: < 1.5dB (GSM1800/1900, UMTS1900/2100)

UC20 User Manual

Table 27: Antenna Requirements

5.3.2. Install the Antenna with RF Connector

The following figure is the antenna installation with RF connector provided by HIROSE. The

recommended RF connector is UF.L-R-SMT.

UC20_Hardware_Design Confidential / Released 61 / 84

Figure 36: Dimensions of the UF.L-R-SMT Connector (Unit: mm)

UMTS/HSPA Module Series

UC20 User Manual

You can use U.FL-LP serial connector listed in the following figure to match the UF.L-R-SMT.

Figure 37: Mechanicals of UF.L-LP Connectors

The following figure describes the space factor of mated connector.

Figure 38: Space Factor of Mated Connector (Unit: mm)

For more details, please visit http://www.hirose.com.

UC20_Hardware_Design Confidential / Released 62 / 84

UMTS/HSPA Module Series

Parameter

Min.

Max.

Unit

VBAT_RF/VBAT_BB

-0.3

4.7 V USB_VBUS

-0.3

5.5 V Peak Current of VBAT_BB

0

0.8 A Peak Current of VBAT_RF

0

1.8 A Voltage at Digital Pins

-0.3

2.3

V

Voltage at ADC0

0

2.1

V

Voltage at ADC1

0

4.2

V

Parameter

Description

Conditions

Min.

Typ.

Max.

Unit

VBAT

VBAT_BB and

VBAT_RF

Voltage must stay within the

min/max values, including voltage

3.3

3.8

4.3

V

UC20 User Manual

6 Electrical, Reliability and Radio

Characteristics

6.1. Absolute Maximum Ratings

Absolute maximum ratings for power supply and voltage on digital and analog pins of module are listed in

the following table:

Table 28: Absolute Maximum Ratings

6.2. Power Supply Ratings

Table 29: The Module Power Supply Ratings

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UMTS/HSPA Module Series

Parameter

Description

Conditions

Min.

Typ.

Max.

Unit

drop, ripple and spikes.

Voltage drop

during

transmitting

burst

Maximum power control level on

GSM850 and EGSM900.

400

mV

I

VBAT

Peak supply

current (during

transmission

slot)

Maximum power control level on

GSM850 and EGSM900.

1.8

2.0

A

USB_VBUS

USB detection

3.0

5.0

5.25

V

Parameter

Min.

Typ.

Max.

Unit

Normal Temperature

-35

25

75

ºC

Restricted Operation

-40~ -35

75 ~ 85

ºC

Storage Temperature

-45 90

ºC

The maximum surface temperature may be up to 100ºC when module works at 85ºC ambient

temperature.

NOTE

UC20 User Manual

6.3. Operating Temperature

The operating temperature is listed in the following table.

Table 30: Operating Temperature

6.4. Current Consumption

The values of current consumption are shown below.

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UMTS/HSPA Module Series

Parameter

Description

Conditions

Typ.

Unit

I

VBAT

OFF state

supply current

Power down

45

uA

GSM/GPRS

supply current

Sleep (USB disconnected)

3.6 @DRX=2

mA

1.5 @DRX=9

mA

Sleep (USB suspended)

3.7 @DRX=2

mA

1.6 @DRX=9

mA

Idle (USB disconnected)

15.0 @DRX=2

mA

Idle (USB connected)

32.0 @DRX=2

mA

WCDMA

supply current

Sleep (USB disconnected)

2.9 @DRX=6

mA

1.1 @DRX=9

mA

Sleep (USB suspended)

3.0 @DRX=6

mA

1.2 @DRX=9

mA

Idle (USB disconnected)

15.0 @DRX=6

mA

Idle (USB connected)

34.0 @DRX=6

mA

GPRS data

transfer (GNSS

off)

GSM850 1DL/1UL PCL=5

260

mA

GSM850 4DL/1UL PCL=5

276

mA

GSM850 3DL/2UL PCL=5

385

mA

GSM850 2DL/3UL PCL=5

483

mA

GSM850 1DL/4UL PCL=5

554

mA

EGSM900 1DL/1UL PCL=5

275

mA

EGSM900 4DL/1UL PCL=5

312

mA

EGSM900 3DL/2UL PCL=5

448

mA

EGSM900 2DL/3UL PCL=5

540

mA

EGSM900 1DL/4UL PCL=5

610

mA

DCS1800 1DL/1UL PCL=0

196

mA

UC20 User Manual

Table 31: The Module Current Consumption

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UMTS/HSPA Module Series

DCS1800 4DL/1UL PCL=0

204

mA

DCS1800 3DL/2UL PCL=0

299

mA

DCS1800 2DL/3UL PCL=0

368

mA

DCS1800 1DL/4UL PCL=0

432

mA

PCS1900 1DL/1UL PCL=0

238

mA

PCS1900 4DL/1UL PCL=0

247

mA

PCS1900 3DL/2UL PCL=0

256

mA

PCS1900 2DL/3UL PCL=0

467

mA

PCS1900 1DL/4UL PCL=0

572

mA

EDGE data

transfer (GNSS

off)

GSM850 1DL/1UL PCL=8

190

mA

GSM850 4DL/1UL PCL=8

210

mA

GSM850 3DL/2UL PCL=8

306

mA

GSM850 2DL/3UL PCL=8

400

mA

GSM850 1DL/4UL PCL=8

494

mA

EGSM900 1DL/1UL PCL=8

185

mA

EGSM900 4DL/1UL PCL=8

197

mA

EGSM900 3DL/2UL PCL=8

293

mA

EGSM900 2DL/3UL PCL=8

386

mA

EGSM900 1DL/4UL PCL=8

480

mA

DCS1800 1DL/1UL PCL=2

162

mA

DCS1800 4DL/1UL PCL=2

165

mA

DCS1800 3DL/2UL PCL=2

245

mA

DCS1800 2DL/3UL PCL=2

322

mA

DCS1800 1DL/4UL PCL=2

399

mA

PCS1900 1DL/1UL PCL=2

189

mA

PCS1900 4DL/1UL PCL=2

189

mA

UC20 User Manual

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UMTS/HSPA Module Series

PCS1900 3DL/2UL PCL=2

298

mA

PCS1900 2DL/3UL PCL=2

401

mA

PCS1900 1DL/4UL PCL=2

503

mA

WCDMA data

transfer (GNSS

off)

UMTS Band I HSDPA @max power

557

mA

UMTS Band I HSUPA @max power

542

mA

UMTS Band II HSDPA @max power

549

mA

UMTS Band II HSUPA @max power

536

mA

UMTS Band V HSDPA @max power

593

mA

UMTS Band V HSUPA @max power

576

mA

UMTS Band VI HSDPA @max power

530

mA

UMTS Band VI HSUPA @max power

493

mA

UMTS Band VIII HSDPA @max power

539

mA

UMTS Band VIII HSUPA @max power

505

mA

GSM voice call

GSM850 @PCL=5

292

mA

EGSM900 @PCL=5

293

mA

DCS1800 @PCL=0

235

mA

PCS1900 @PCL=0

288

mA

WCDMA voice

call

UMTS Band I @max power

531

mA

UMTS Band II @max power

532

mA

UMTS Band V @max power

528

mA

UMTS Band VI @max power

470

mA

UMTS Band VIII @max power

490

mA

GNSS off

Idle, USB active @WCDMA DRX=6

34.0

mA

Cold start

(Autonomous)

83.8

mA

Tracking

(Autonomous)

74.6

mA

Tracking

(DPO on)

51.7

mA

UC20 User Manual

UC20_Hardware_Design Confidential / Released 67 / 84

UMTS/HSPA Module Series

GNSS tracking current is tested in the following conditions:

 For Cold Start, 10 minutes after First Fix.  For Hot Start, 15 seconds after First Fix.

Frequency

Max.

Min.

GSM850

33dBm±2dB

5dBm±5dB

EGSM900

33dBm±2dB

5dBm±5dB

DCS1800

30dBm±2dB

0dBm±5dB

PCS1900

30dBm±2dB

0dBm±5dB

GSM850 (8-PSK)

27dBm±3dB

5dBm±5dB

EGSM900 (8-PSK)

27dBm±3dB

5dBm±5dB

DCS1800 (8-PSK)

26dBm±3dB

0dBm±5dB

PCS1900 (8-PSK)

26dBm±3dB

0dBm±5dB

UMTS 2100

24dBm+1/-3dB

<-50dBm

UMTS 1900

24dBm+1/-3dB

<-50dBm

UMTS 900

24dBm+1/-3dB

<-50dBm

UMTS 850

24dBm+1/-3dB

<-50dBm

UMTS 800

24dBm+1/-3dB

<-50dBm

In GPRS 4 slots TX mode, the max output power is reduced by 2.5dB. This design conforms to the GSM

specification as described in chapter 13.16 of 3GPP TS 51.010-1.

NOTE

UC20 User Manual

6.5. RF Output Power

The following table shows the RF output power of UC20 module.

Table 32: Conducted RF Output Power

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UMTS/HSPA Module Series

Frequency

Receive Sensitivity (Typ.)

GSM850

-108.5dBm

EGSM900

-108.5dBm

DCS1800

-108dBm

PCS1900

-108dBm

UMTS 2100

-110dBm

UMTS 1900

-110dBm

UMTS 900

-110dBm

UMTS 850

-110dBm

UMTS 800

-110dBm

Tested Points

Contact Discharge

Air Discharge

Unit

VBAT, GND

±5

±10

kV

All Antenna Interfaces

±4

±8

kV

Other Interfaces

±0.5

±1

kV

UC20 User Manual

6.6. RF Receiving Sensitivity

The following table shows the conducted RF receiving sensitivity of UC20 module.

Table 33: Conducted RF Receiving Sensitivity

6.7. Electrostatic Discharge

The module is not protected against electrostatics discharge (ESD) in general. Consequently, it is subject

to ESD handling precautions that typically apply to ESD sensitive components. Proper ESD handling and

packaging procedures must be applied throughout the processing, handling and operation of any

application that incorporates the module.

The following table shows the module electrostatics discharge characteristics.

Table 34: Electrostatics Discharge Characteristics

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UMTS/HSPA Module Series

(32+/-0.15)

(29+/-0.15)

UC20 User Manual

7 Mechanical Dimensions

This chapter describes the mechanical dimensions of the module. All dimensions are measured in mm.

7.1. Mechanical Dimensions of the Module

Figure 39: UC20 Top and Side Dimensions

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UMTS/HSPA Module Series

3.4

3.2

3.4 3.2 3.4 3.2

4.8

32.0

29.0

UC20 User Manual

Figure 40: UC20 Bottom Dimensions (Bottom View)

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UMTS/HSPA Module Series

UC20 User Manual

Figure 41: Bottom Pads Dimensions (Bottom View)

UC20_Hardware_Design Confidential / Released 72 / 84

UMTS/HSPA Module Series

1.9

7.8

13

1.9

9.049.3

6.45

3.45

4.4

22.1

6.16

0.8

1.3

4.8

2

3

4.6

2.5

1.0

3.4

6.8

Keepout area

29.0

1. Pads 73~84 at the bottom center of module cannot be designed. And keep out the areas shown in

pink on the above figure in the host PCB.

2. In order to maintain the module, keep about 3mm between the module and other components in the

host PCB.

NOTES

UC20 User Manual

7.2. Footprint of Recommendation

Figure 42: Recommended Footprint (Top View)

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UMTS/HSPA Module Series

UC20 User Manual

7.3. Top View of the Module

Figure 43: Top View of the Module

7.4. Bottom View of the Module

Figure 44: Bottom View of the Module

UC20_Hardware_Design Confidential / Released 74 / 84

UMTS/HSPA Module Series

As plastic container cannot be subjected to high temperature, module needs to be taken out from

container to high temperature (125ºC) bake. If shorter bake times are desired, please refer to

IPC/JEDECJ-STD-033 for bake procedure.

NOTE

UC20 User Manual

8 Storage and Manufacturing

8.1. Storage

UC20 is stored in the vacuum-sealed bag. The restriction of storage condition is shown as below.

Shelf life in sealed bag is 12 months at < 40ºC/90%RH.

After this bag is opened, devices that will be subjected to reflow solder or other high temperature process

must be:

 Mounted within 72 hours at factory conditions of ≤ 30ºC/60%RH.  Stored at < 10% RH.

Devices require bake before mounting, if:

 Humidity indicator card is > 10% when read 23ºC±5ºC.  Mounted for more than 72 hours at factory conditions of ≤ 30ºC/60% RH.

If baking is required, devices may be baked for 48 hours at 125ºC±5ºC.

8.2. Manufacturing and Welding

The squeegee should push the paste on the surface of the stencil that makes the paste fill the stencil

openings and penetrate to the PCB. The force on the squeegee should be adjusted so as to produce a

clean stencil surface on a single pass. To ensure the module soldering quality, the thickness of stencil at

the hole of the module pads should be 0.18mm. For details, please refer to document [6].

UC20_Hardware_Design Confidential / Released 75 / 84

UMTS/HSPA Module Series

Time

50

100

150 200

250 300

50

100

150

200

250

160 ºC

200 ºC

217

0

70s~120s

40s~60s

Between 1~3 ºC/s

Preheat Heating Cooling

ºC

s

Liquids Temperature

UC20 User Manual

It is suggested that peak reflow temperature is 235 ~ 245ºC (for SnAg3.0Cu0.5 alloy). Absolute max

reflow temperature is 260ºC. To avoid damage to the module when it was repeatedly heated, it is

suggested that the module should be mounted after the first panel has been reflowed. The following

picture is the actual diagram which we have operated.

Figure 45: Liquids Temperature

8.3. Packaging

UC20 is packaged in the tap and reel carriers. One reel is 11.53m length and contains 250pcs modules.

The figure below shows the package details, measured in mm.

UC20_Hardware_Design Confidential / Released 76 / 84

UMTS/HSPA Module Series

30.3

± 0.15

29.3

± 0.15

30.3

± 0.15

32.5

± 0.15

33.5

± 0.15

0.35± 0.05

4.2

± 0.15

3.1

± 0.15

32.5± 0.15

33.5± 0.15

4.00

± 0.1

2.00

± 0.1

1.75

± 0.1

20.20

± 0.15

44.00

± 0.3

44.00

± 0.1

1.50

±

0.1

Direction of feed

Cover tape

13

100

44.5

+0.20

-0.00

48.5

UC20 User Manual

Figure 46: Carrier Tape

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UMTS/HSPA Module Series

SN

Document Name

Remark

[1]

Quectel_UC20_AT_Commands_Manual

UC20 AT Commands Manual

[2]

Quectel_UC20_EVB_User_Guide

UC20 EVB User Guide

[3]

Quectel_UC20_Reference_Design

UC20 Reference Design

[4]

Quectel_UC20&M10_Reference_Design

UC20 and M10 Compatible Reference

Design

[5]

Quectel_UC20&M10_Compatible_Design

UC20 and M10 Compatible Design

[6]

Quectel_Module_Secondary_SMT_User_Guide

Module Secondary SMT User Guide

[7]

Quectel_UC20_GNSS_AT_Commands_Manual

UC20 GNSS AT Commands Manual

[8]

Quectel_UC20_Power_Management_Applicaition_

Note

UC20 Power Management Application

Note

Abbreviation

Description

AMR

Adaptive Multi-rate

ARP

Antenna Reference Point

bps

Bits Per Second

CEP

Circular Error Probable

CHAP

Challenge Handshake Authentication Protocol

CS

Coding Scheme

CSD

Circuit Switched Data

UC20 User Manual

9 Appendix A Reference

Table 35: Related Documents

Table 36: Terms and Abbreviations

UC20_Hardware_Design Confidential / Released 78 / 84

UMTS/HSPA Module Series

CTS

Clear To Send

DCE

Data Communications Equipment (typically module)

DRX

Discontinuous Reception

DTE

Data Terminal Equipment (typically computer, external controller)

DTR

Data Terminal Ready

DTX

Discontinuous Transmission

EFR

Enhanced Full Rate

EGSM

Extended GSM900 band (includes standard GSM900 band)

ESD

Electrostatic Discharge

FR

Full Rate

GLONASS

GLObalnaya NAvigatsionnaya Sputnikovaya Sistema, the Russian Global

Navigation Satellite System

GMSK

Gaussian Minimum Shift Keying

GNSS

Global Navigation Satellite System

GPS

Global Positioning System

GSM

Global System for Mobile Communications

HR

Half Rate

HSPA

High Speed Packet Access

I/O

Input/Output

IMEI

International Mobile Equipment Identity

Imax

Maximum Load Current

Inorm

Normal Current

LED

Light Emitting Diode

LNA

Low Noise Amplifier

ME

Mobile Equipment

MO

Mobile Originated

UC20 User Manual

UC20_Hardware_Design Confidential / Released 79 / 84

UMTS/HSPA Module Series

MS

Mobile Station (GSM engine)

MT

Mobile Terminated

PAP

Password Authentication Protocol

PBCCH

Packet Switched Broadcast Control Channel

PCB

Printed Circuit Board

PDU

Protocol Data Unit

PPP

Point-to-Point Protocol

PSK

Phase Shift Keying

QAM

Quadrature Amplitude Modulation

QPSK

Quadrature Phase Shift Keying

RF

Radio Frequency

RHCP

Right Hand Circularly Polarized

RMS

Root Mean Square (value)

RTC

Real Time Clock

Rx

Receive

SIM

Subscriber Identification Module

SMS

Short Message Service

TE

Terminal Equipment

UART

Universal Asynchronous Receiver & Transmitter

UMTS

Universal Mobile Telecommunications System

URC

Unsolicited Result Code

USIM

Universal Subscriber Identity Module

USSD

Unstructured Supplementary Service Data

Vmax

Maximum Voltage Value

Vnorm

Normal Voltage Value

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UMTS/HSPA Module Series

Vmin

Minimum Voltage Value

VIHmax

Maximum Input High Level Voltage Value

VIHmin

Minimum Input High Level Voltage Value

VILmax

Maximum Input Low Level Voltage Value

VILmin

Minimum Input Low Level Voltage Value

VImax

Absolute Maximum Input Voltage Value

VImin

Absolute Minimum Input Voltage Value

VOHmax

Maximum Output High Level Voltage Value

VOHmin

Minimum Output High Level Voltage Value

VOLmax

Maximum Output Low Level Voltage Value

VOLmin

Minimum Output Low Level Voltage Value

VSWR

Voltage Standing Wave Ratio

WCDMA

Wideband Code Division Multiple Access

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UMTS/HSPA Module Series

Sch

eme

Code

Rate

USF

Pre-coded

USF

Radio Block

excl.USF and

BCS

Tail

Coded

Bits

Punctured

Bits

Data Rate

Kb/s

CS-1

1/2 3 3

181

40 4 456

0

9.05

CS-2

2/3 3 6

268

16 4 588

132

13.4

CS-3

3/4 3 6

312

16 4 676

220

15.6

CS-4

1 3 12

428

16 - 456

-

21.4

UC20 User Manual

10 Appendix B GPRS Coding Scheme

Table 37: Description of Different Coding Schemes

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UMTS/HSPA Module Series

Multislot Class

Downlink Slots

Uplink Slots

Active Slots

1 1 1 2 2 2 1 3 3 2 2 3 4 3 1 4 5 2 2 4 6 3 2 4 7 3 3 4 8 4 1 5 9 3 2 5 10 4 2 5 11 4 3 5 12 4 4

5

UC20 User Manual

11 Appendix C GPRS Multi-slot Class

Twenty-nine classes of GPRS multi-slot modes are defined for MS in GPRS specification. Multi-slot

classes are product dependant, and determine the maximum achievable data rates in both the uplink and

downlink directions. Written as 3+1 or 2+2, the first number indicates the amount of downlink timeslots,

while the second number indicates the amount of uplink timeslots. The active slots determine the total

number of slots the GPRS device can use simultaneously for both uplink and downlink communications.

The description of different multi-slot classes is shown in the following table.

Table 38: GPRS Multi-slot Classes

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UMTS/HSPA Module

Coding Scheme

Modulation

Coding Family

1 Timeslot

2 Timeslot

4 Timeslot

CS-1:

GMSK

/

9.05kbps

18.1kbps

36.2kbps

CS-2:

GMSK

/

13.4kbps

26.8kbps

53.6kbps

CS-3:

GMSK

/

15.6kbps

31.2kbps

62.4kbps

CS-4:

GMSK

/

21.4kbps

42.8kbps

85.6kbps

MCS-1

GMSK

C

8.80kbps

17.60kbps

35.20kbps

MCS-2

GMSK

B

11.2kbps

22.4kbps

44.8kbps

MCS-3

GMSK

A

14.8kbps

29.6kbps

59.2kbps

MCS-4

GMSK

C

17.6kbps

35.2kbps

70.4kbps

MCS-5

8-PSK

B

22.4kbps

44.8kbps

89.6kbps

MCS-6

8-PSK

A

29.6kbps

59.2kbps

118.4kbps

MCS-7

8-PSK

B

44.8kbps

89.6kbps

179.2kbps

MCS-8

8-PSK

A

54.4kbps

108.8kbps

217.6kbps

MCS-9

8-PSK

A

59.2kbps

118.4kbps

236.8kbps

UC20 Hardware Design

12 Appendix D EDGE Modulation and

Coding Scheme

Table 39: EDGE Modulation and Coding Scheme

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Specifications and Main Features

Frequently Asked Questions

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